They are not eating your crocus are they??
I haven't planted any in a while, not at this house but at the old house I had to bury a moth ball along with the bulb. To keep the squirrels from digging them up.
The american vetch was choking out my other plants and seemed to be parasitic because the limbs that they were attached to all seemed to die, like it was sucking the sap out or something....it was crazy.
I got about 12 baby plants this year probably from the neglected seeds. I really would like to try the mustard seed. I found Johnny appleseed and a pound of those seeds are maybe 3.50 and as for clover I have been adding seeds to the lawn for a long time. Not the Crimson but the Dutch White.